A kind of dimer acid and preparation method thereof

A technology of dimer acid and eleostearic acid, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of high cost of separation and purification, high polymerization reaction temperature, large amount of catalyst added, etc. The effect of good product quality, improved yield and high yield

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned synthesis method, the synthesis of dimer acid all needs to add catalyst or / and catalytic assistant, and wherein catalyst addition amount is large, and used catalyst is powdery, and follow-up separation and purification cost is higher, and product is lost in the separation process, and will cause some environmental pollution
In addition, the polymerization reaction temperature is relatively high, generally not lower than 240°C, and some reaction processes require pressure, which requires high equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Commodity tung oleic acid (purchased from Anhui Ruifand Oil Deep Processing Co., Ltd., model: T160) was used, cotton oleic acid was used as dispersant, and tert-butyl hydroquinone was used as polymerization inhibitor.

[0029] Take 100g of dispersant and 0.5g of polymerization inhibitor, put it in a 250mL four-necked flask, stir at 300rpm, purge with nitrogen for 30min, heat up to 220°C, add 100g of eleuic acid, react for 4h, stop heating, cool in ice water to room temperature, The dimer acid product is obtained. As determined by GPC, the content of dimer acid was 62.68%, and the content of trimer acid was 9.18%.

Embodiment 2

[0031] Commodity tung oleic acid (purchased from Anhui Reifend Oil Deep Processing Co., Ltd., model: T155) was used, cotton oleic acid was used as dispersant, and tert-butyl hydroquinone was used as polymerization inhibitor.

[0032] Take 100g of dispersant and 0.5g of polymerization inhibitor, put them in a 250mL four-necked flask, stir while purging with nitrogen, stir at a rate of 300rpm, purge with nitrogen for 30min, heat up to 220°C, add 100g of eleostearic acid, react for 4h, stop heating, Cooling to room temperature in ice water gave the dimer acid product. As determined by GPC, the content of dimer acid was 63.86%, and the content of trimer acid was 8.26%.

Embodiment 3

[0034] The same eleostearic acid, dispersant and polymerization inhibitor as in Example 1 were used.

[0035]Take 50g of dispersant and 1g of polymerization inhibitor, put them in a 250mL four-necked flask, stir while purging with nitrogen, stir at a rate of 200rpm, purge with nitrogen for 25min, heat up to 200°C, add 100g of eleostearic acid, react for 3h, stop heating, ice Cooling in water to room temperature yields the dimer acid product. As determined by GPC, the content of dimer acid was 61.80%, and the content of trimer acid was 9.28%.

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PUM

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Abstract

The invention relates to a dimer acid and a preparation method thereof. In the presence of a polymerization inhibitor and a dispersant, nitrogen purging is carried out while stirring, the temperature is raised to 180-230° C., tungoleic acid is added for reaction, and a dimer acid product is obtained after the reaction is completed. . The dimer acid of the present invention is prepared by adopting the above-mentioned method of the present invention, and the molecular formula of the dimer acid is C 34 h 58 (COOH) 2 , The content of dimer acid in the product is ≥60%. The invention uses tungoleic acid as a raw material to synthesize dimer acid without using a catalyst, relatively mild reaction conditions, simple process and high yield of dimer acid.

Description

technical field [0001] The invention belongs to the field of dimer acid synthesis, in particular to a dimer acid and a preparation method thereof. Background technique [0002] Dimer acid is named because it contains two carboxylic acid groups in its molecule, mainly referring to C18 unsaturated fatty acid under certain conditions, according to Diels-Alder reaction to generate dimer acid with C36 as the main component. According to the reaction mechanism, the basic structures of dimer acids are roughly divided into three categories: monocyclic, bicyclic and acyclic. Commercial dimer acid is a mixture of isomers. [0003] The dimer acid has a moderate molecular weight and a unique structure. The molecule has both a long flexible carbon chain and a relatively rigid cyclic structure. It not only has both polar and non-polar groups, but also has carbonyl and double bonds. reactive groups. These unique molecular structures give them unique physical and chemical properties and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/353C07C55/02C08G69/02
Inventor 曹长海李澜鹏王宜迪程瑾李秀峥王领民乔凯
Owner CHINA PETROLEUM & CHEM CORP
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